With so many orphans _______, the charity organization calls for more donations.
| A．to look after | B．being looked after | C．to be looked after | D．looked after |
We still have some other ways to solve the problem. You ______ be worried.
| A．mustn’t | B．can’t |
| C．don’t have to | D．may not |
Harry Potter has made reading popular again, ______ is why parents and teachers like the book, too.
| A．that | B．who | C．which | D．what |
Some countries have banned smoking in public places ______ public health.
| A．improve | B．to improve |
| C．improving | D．improved |
Mr. Smith had to go to work by bus this morning as his car ______.
| A．would repair |
| B．was repairing |
| C．had been repaired |
| D．was being repaired |
Food and fruit are forbidden in the library, ______ you are allowed to have drinks and sweets with you.
| A．and | B．but | C．so | D．or |